Abstract: A diagnostic apparatus includes a stethoscope, an electrocardiac detector, a control unit, and an external unit. A sound detector is a chest piece to make contact with a patient's skin, and includes a first detector to detect a relatively high frequency and a second detector to detect a relatively low frequency. The electrocardiac detector includes electrodes to detect potentials associated with heart beats, and is provided on each of the first and second detectors. The control unit converts electrocardiac signals detected by the electrocardiac detector into radio signals that are transmitted to the external unit. The external unit is a portable terminal apparatus, and includes a display unit formed by a liquid crystal panel on a front surface thereof, an operation part including operation buttons and ten-key, and patient selection buttons to select reading of data of patients.

Abstract: Disclosed are a vascular disease examination system capable of examining and diagnosing vascular diseases such as arterial obliteration by determining the feature quantities of blood flow velocity waveforms or blood pressure waveforms or blood flow rates, and a bypass vascular diagnosing system. A blood flow velocity or blood pressure at a target location of the body is measured A waveform analysis unit 4 determines the feature quantity of a blood flow waveform (or blood pressure waveform), for displaying on an output unit 5. The feature quantity includes a time constant, Fourier transform value, differentiated value, integrated value, rise/fall time, and sharpness or gradient of rise. Feature quantity of a blood flow velocity waveform (or blood pressure waveform) indicated in numeric value enables a correct examination/diagnosis.

Abstract: Disclosed are a vascular disease examination system capable of examining and diagnosing vascular diseases such as arterial obliteration by determining the feature quantities of blood flow velocity waveforms or blood pressure waveforms or blood flow rates, and a bypass vascular diagnosing system. A blood flow velocity or blood pressure at a target location of the body is measured and the measurement signal is supplied to a vascular disease examination system 1. The measurement signal is converted into a digital signal at an A/D conversion unit 2 and temporarily stored in a memory unit 3. A waveform analysis unit 4 determines the feature quantity of a blood flow waveform (or blood pressure waveform), for displaying on an output unit 5. The feature quantity includes a time constant, Fourier transform value, differentiated value, integrated value, rise/fall time, and sharpness or gradient of rise.